The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.
# Object: 17BU236
# Created Sun Dec 22 02:10:55 2024
# Orbit generated from Bernstein formalism
# Fitting 23 observations of 23
# Arc: 0.90y
# First observation: 2016/04/02
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000037 0.024934 0.000003 -0.008405 0.024538 0.000000
# Chi-squared of fit: 8.12 DOF: 40 RMS: 0.11
# Min/Max residuals: -0.19 0.27
# Exact a, adot, b, bdot, g, gdot:
1.515555E-05 2.482634E-02 -5.355594E-06 -8.454848E-03 2.497639E-02 -6.477580E-04
# Covariance matrix:
2.0647E-13 1.7663E-12 1.7513E-14 -5.2967E-13 8.9480E-13 6.9059E-11
1.7663E-12 2.2022E-10 1.7300E-12 -5.5015E-11 7.7085E-11 7.1504E-09
1.7513E-14 1.7300E-12 1.7398E-13 -6.2746E-13 6.2181E-13 5.6661E-11
-5.2967E-13 -5.5015E-11 -6.2746E-13 1.4206E-11 -1.9578E-11 -1.7968E-09
8.9480E-13 7.7085E-11 6.2181E-13 -1.9578E-11 2.8534E-11 2.5461E-09
6.9059E-11 7.1504E-09 5.6661E-11 -1.7968E-09 2.5461E-09 2.3358E-07
# lat0 lon0 xBary yBary zBary JD0
3.093113 -173.847312 -0.114920 0.053502 -0.987513 2457480.894196
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 353.31926 +/- 5.668
Argument of Peri: 179.89360 +/- 7.838
Long of Asc Node: 15.12207 +/- 0.002
Inclination: 19.00430 +/- 0.003
Eccentricity: 0.15337208 +/- 0.0029
Semi-Major Axis: 48.37938160 +/- 0.0367
Time of Perihelion: 2459761.4261 +/- 1935.2
Perihelion: 40.95933507 +/- 0.1446
Aphelion: 55.79942813 +/- 0.1475
Period (y) 336.5105 +/- 0.38
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -40.72385103 +/- 0.0085
Ecliptic Y -4.50783989 +/- 0.0009
Ecliptic Z 2.16020014 +/- 0.0005
Ecliptic XDOT 0.00031256 +/- 0.0001
Ecliptic YDOT -0.00271047 +/- 0.0000
Ecliptic ZDOT -0.00092927 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.02949095 +/- 0.0084
Geocenter to KBO 40.03780515 +/- 0.0086
# Hcoef: 8.67
The following table shows the complete astrometric record for 17BU236. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (17BU236) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.393407 12 27 29.36 +00 23 50.5 17BU236 T09 C~86uj 2016 04 02.525980 12 27 28.73 +00 23 53.6 17BU236 T09 C~86uj 2016 04 04.34883 12 27 20.21 +00 24 38.1 25.3g 17BU236 T09 C~89UT 2016 04 04.37012 12 27 20.12 +00 24 38.8 25.5g 17BU236 T09 C~89UT 2016 04 04.41508 12 27 19.91 +00 24 39.8 25.6g 17BU236 T09 C~89UT 2016 04 04.51097 12 27 19.45 +00 24 42.0 25.2g 17BU236 T09 C~89UT 2016 04 04.52167 12 27 19.41 +00 24 42.5 25.2g 17BU236 T09 C~89UT 2016 04 04.55367 12 27 19.25 +00 24 43.2 25.2g 17BU236 T09 C~89UT 2016 06 05.320049 12 23 53.61 +00 38 30.2 17BU236 T09 C~86uj 2016 06 05.358251 12 23 53.57 +00 38 30.2 17BU236 T09 C~86uj 2017 01 30.63152 12 35 56.32 -00 58 52.7 24.8z 17BU236 T09 C~81Bp 2017 01 30.65438 12 35 56.25 -00 58 52.7 24.8z 17BU236 T09 C~81Bp 2017 01 30.65979 12 35 56.25 -00 58 52.5 25.0z 17BU236 T09 C~81Bp 2017 01 30.66247 12 35 56.25 -00 58 52.7 24.6z 17BU236 T09 C~81Bp 2017 02 02.61925 12 35 49.85 -00 58 15.7 24.4i 17BU236 T09 C~81Bp 2017 02 02.62764 12 35 49.82 -00 58 15.6 24.3i 17BU236 T09 C~81Bp 2017 02 02.64725 12 35 49.78 -00 58 15.4 24.2i 17BU236 T09 C~81Bp 2017 02 02.65568 12 35 49.77 -00 58 15.0 24.6i 17BU236 T09 C~81Bp 2017 02 23.56555 12 34 45.96 -00 52 08.4 24.9r 17BU236 T09 C~81Bp 2017 02 23.59957 12 34 45.83 -00 52 07.9 25.0r 17BU236 T09 C~81Bp 2017 02 23.60801 12 34 45.79 -00 52 07.7 24.4r 17BU236 T09 C~81Bp 2017 02 23.63774 12 34 45.68 -00 52 06.9 24.4r 17BU236 T09 C~81Bp 2017 02 23.63983 12 34 45.67 -00 52 07.1 24.4r 17BU236 T09 C~81Bp
The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.
1 0.0000 0.00 0.12 0.00 0.00
2 0.0004 -9.91 0.19 -0.89 -0.13
3 0.0054 -144.88 -0.15 -10.56 -0.14
4 0.0054 -146.40 -0.08 -10.45 0.09
5 0.0055 -149.69 0.00 -10.78 0.03
6 0.0058 -156.89 -0.02 -11.49 -0.11
7 0.0058 -157.64 0.03 -11.27 0.17
8 0.0059 -160.12 -0.07 -11.57 0.05
9 0.1750 -3320.51 -0.07 -471.72 -0.05
10 0.1751 -3321.06 0.06 -471.95 0.07
11 0.8302 8952.81 0.02 -1552.33 0.27
12 0.8303 8951.85 -0.17 -1552.74 -0.11
13 0.8303 8951.77 -0.06 -1552.56 0.09
14 0.8303 8951.85 0.11 -1552.74 -0.09
15 0.8384 8848.86 0.05 -1556.69 0.01
16 0.8384 8848.41 -0.08 -1556.78 -0.06
17 0.8385 8847.78 0.03 -1556.83 -0.07
18 0.8385 8847.48 0.05 -1556.52 0.25
19 0.8957 7821.79 0.01 -1598.03 0.11
20 0.8958 7819.80 0.09 -1598.34 -0.10
21 0.8959 7819.17 -0.02 -1598.39 -0.13
22 0.8959 7817.33 -0.05 -1598.31 0.05
23 0.8960 7817.27 0.02 -1598.56 -0.19
The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.
17BU236 quality flag:2 Type: SCATEXTD SCATEXTD SCATNEAR axisobj 47.809 48.080 47.749 ecceobj 0.143 0.151 0.144 incobj 19.093 19.082 19.099 qmin 39.519 39.791 39.528 qmax 56.938 57.300 57.030 amean 48.045 48.311 47.771 amin 47.572 47.888 47.185 amax 48.528 48.787 48.472 emean 0.153 0.159 0.135 emin 0.132 0.145 0.104 emax 0.175 0.175 0.177 imean 18.786 18.911 18.882 imin 18.306 18.550 18.325 imax 19.296 19.269 19.539 excite_mean 0.357 0.361 0.351 fracstop 1.000 1.000 1.000 cjmean 2.990 2.989 2.991 libcent 0 -180.0 -180.0 -180.0 libamp 0 -180.0 -180.0 -180.0 libcent 1 -180.0 -180.0 -180.0 libamp 1 -180.0 -180.0 -180.0 libcent 2 -180.0 -180.0 -180.0 libamp 2 -180.0 -180.0 -180.0 libcent 3 -180.0 -180.0 -180.0 libamp 3 -180.0 -180.0 -180.0 libcent 4 -180.0 -180.0 -180.0 libamp 4 -180.0 -180.0 -180.0 kozaimean 181.3 179.9 180.8 kozaiamp 180.0 180.0 180.0